US3277864A - Device for vapor-coating selected areas of an internal surface - Google Patents

Device for vapor-coating selected areas of an internal surface Download PDF

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Publication number
US3277864A
US3277864A US308807A US30880763A US3277864A US 3277864 A US3277864 A US 3277864A US 308807 A US308807 A US 308807A US 30880763 A US30880763 A US 30880763A US 3277864 A US3277864 A US 3277864A
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US
United States
Prior art keywords
skirt
bulb
rotatable
vapor
rotatable means
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US308807A
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English (en)
Inventor
Hopstaken Anthonius P Cornelis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
US Philips Corp
North American Philips Co Inc
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US Philips Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US3277864A publication Critical patent/US3277864A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/04—Coating on selected surface areas, e.g. using masks
    • C23C14/046—Coating cavities or hollow spaces, e.g. interior of tubes; Infiltration of porous substrates

Definitions

  • the screening member consists of a number of flexible laminations which are passed through the neck aperture of the bulb to be coated in a contracted condition. Inside the bulb they engage the wall of the bulb opopsite to the neck aperture and are bent by that wall of the bulb and spread in the manner of a fan. In the subsequent vapor disposition of a metal layer, these laminations cover part of the wall of the bulb as a mask.
  • the known apparatus has some disadvantages. First of all, a guiding box which surrounds the laminations so that they can be inserted through the neck of the bulb is indispensable. In addition, the known apparatus can damage the wall of the bulb.
  • the apparatus mitigates these disadvantages and is characterized in that in the rest condition of the apparatus the screening member comprises a skirt positioned around the shaft of a carrier which can be passed through the neck aperture of a bulb, and in addition means are provided for rotating the skirt within the bulb.
  • the outer circumference of the skirt which, when spread as a result of rotation, does not engage the inner wall of the bulb as in the prior art apparatus.
  • the skirt may consist of a number of hinged laminations.
  • the laminations slide on each other as a result of which metal particles may be scratched off which are hard to remove from the bulb.
  • the shield is constituted of a plea-ted skirt consisting of a flexible material which is stretched by rotation.
  • This skirt in the folded condition, can be brought into and out of the bulb and preferably consists of a material which is so flexible that the vapor deposited metal layer is not damaged when the skirt is removed from the bulb; a skirt, for example, of polytetrafiuoroethylene, gives good results.
  • a skirt of such material is also very suitable because it does not give off gas under vacuum conditions.
  • the skirt is connected to a rotatable head piece provided with magnets, rotation being obtained by a rotating mag- 3 ,277,364 Patented Oct. 11, 1366 "Ice netic field which is produced and maintained outside the bulb.
  • FIGURE 1 shows the principal parts of the apparatus according to the invention which includes a screening member consisting of a pleated skirt.
  • FIGURE 2 is a plan view, looking along the arrow II of FIGURE 1, of the four magnets of the rotatable head piece.
  • FIGURE 3 shows the shape of the skirt just before it is passed into the bulb.
  • Apparatus according to the invention consists of a holder 1 for holding a glass bulb 2 so that a high vacuum can be produced within the bulb 2 through a pipe connected to a vacuum pump (not shown).
  • a carrier constituted by a set of supports 3, 4 and a transverse rod 5 as well as a set of electrodes 6 and 7, extends through the holder.
  • a tungsten filament 8 is positioned between the electrodes.
  • a shaft 10 is connected to the transverse rod 5.
  • a ball bearing 11 is located on shaft 10 for rotatably supporting a head piece 12.
  • the rotatable head piece 12 is provided with a screw thread 14 and has a flange 13 as shown.
  • a nut 15 threaded on the head 12, clamps a skirt or screening member 45 (FIGURE 3) between the nut and the flange.
  • This screening member is manufactured from a flexible substance, for example polytetrafiuoroethylene.
  • the rotatable headpiece 12 further includes the four cylindrical magnets 20, 21, 22, 23.
  • an electric motor 30 is connected to a movable plate 31.
  • a flange 33 is connected to the motor shaft 32 on the circumference of which flange magnets 34 and 35 are provided.
  • the holder 1 and the plate 31 are spaced apart and a metal rod 38 to be evaporated is placed in the filament 8.
  • the neck of the bulb 2 is passed over the screening member folded as a pleated skirt 45 (FIGURE 3), as a result of which the skirt assumes the inverted position 46 shown in FIGURE 1 inside the bulb.
  • the electric motor 30 is brought into position and switched on, as a result of which the magnets 34, 35 start rotating and a rotating magnetic field is produced.
  • the magnets 20 to 23 within the bulb will also start rotating, so that the head piece 12 and consequently the skirt 46 are rotated.
  • the skirt 46 is stretched and opens into a disc as a result of the centrifugal action which is indicated by reference numera1 48.
  • the outer circumference of the skirt does not touch the inner wall of the bulb 2.
  • the filament 8 is heated to glowing in the high vacuum inside the bulb which has been produced.
  • a metal layer will be deposited on the par-t of the wall of the bulb indicated by 50.
  • the stretched skirt or disc 48 serves as a shadow screen, as a result of which the part of the bulb below the skirt 48 is not provided with a metal layer.
  • said rotatable means comprises a carrier having a rotatable head piece at one end, said means for securing said mask element being connected with said rotatable head piece; and means connected with said carrier for closing and evacuating said body; permanent magnets connected with said head piece and means defining a rotatable magnetic field for driving said head piece.
  • said skirt consists of a flexible material such as, f.i., polytetrafiuoroethylene.
  • said means comprises a pair of rotatably mounted permanent magnets, and means defining a rotatable magnetic field for rotating said magnets.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physical Vapour Deposition (AREA)
  • Medical Preparation Storing Or Oral Administration Devices (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
US308807A 1962-09-28 1963-09-13 Device for vapor-coating selected areas of an internal surface Expired - Lifetime US3277864A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL283791 1962-09-28

Publications (1)

Publication Number Publication Date
US3277864A true US3277864A (en) 1966-10-11

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ID=19754148

Family Applications (1)

Application Number Title Priority Date Filing Date
US308807A Expired - Lifetime US3277864A (en) 1962-09-28 1963-09-13 Device for vapor-coating selected areas of an internal surface

Country Status (8)

Country Link
US (1) US3277864A (enrdf_load_stackoverflow)
BE (1) BE637909A (enrdf_load_stackoverflow)
CH (1) CH432177A (enrdf_load_stackoverflow)
DE (1) DE1287765B (enrdf_load_stackoverflow)
DK (1) DK106755C (enrdf_load_stackoverflow)
ES (1) ES292006A1 (enrdf_load_stackoverflow)
GB (1) GB997899A (enrdf_load_stackoverflow)
NL (1) NL283791A (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4190019A (en) * 1976-09-18 1980-02-26 Hunt Claude J L Vacuum metallizing interior of hollow article with masking shield
US4191128A (en) * 1977-11-19 1980-03-04 Hunt Claude J L Vacuum metallizing of hollow articles
WO2005095847A3 (en) * 2004-04-01 2007-02-08 Philips Intellectual Property Holder device for manufacturing partial coatings on at least the burner of a lamp bulb
CN112011764A (zh) * 2020-08-28 2020-12-01 重庆冠昌光电科技有限公司 一种灯泡玻壳内壁局部真空镀膜设备

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4305631A (en) * 1979-12-05 1981-12-15 Radiologic Sciences, Inc. High temperature bearing bakeout process
DE3601010A1 (de) * 1986-01-15 1987-07-16 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Vorrichtung zum teilweisen beschichten der innenoberflaeche von lampenkolben

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2123706A (en) * 1932-07-20 1938-07-12 Hygrade Sylvania Corp Method of manufacture of reflector bulbs
US2160714A (en) * 1932-07-20 1939-05-30 Hygrade Sylvania Corp Apparatus for interiorly coating lamps, tubes, and the like
US2369764A (en) * 1943-09-30 1945-02-20 Bausch & Lomb Apparatus for forming optical wedges
US2432950A (en) * 1943-09-24 1947-12-16 Bausch & Lomb Apparatus for making optical wedges
US2657150A (en) * 1948-05-18 1953-10-27 Gen Electric Method and masking shield for interiorly coating hollow articles
US2831455A (en) * 1955-08-04 1958-04-22 Philco Corp Masking means
US2879740A (en) * 1957-05-02 1959-03-31 Gen Electric Apparatus for internally coating articles
US2946697A (en) * 1957-12-31 1960-07-26 Westinghouse Electric Corp Masking method and apparatus

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2123706A (en) * 1932-07-20 1938-07-12 Hygrade Sylvania Corp Method of manufacture of reflector bulbs
US2160714A (en) * 1932-07-20 1939-05-30 Hygrade Sylvania Corp Apparatus for interiorly coating lamps, tubes, and the like
US2432950A (en) * 1943-09-24 1947-12-16 Bausch & Lomb Apparatus for making optical wedges
US2369764A (en) * 1943-09-30 1945-02-20 Bausch & Lomb Apparatus for forming optical wedges
US2657150A (en) * 1948-05-18 1953-10-27 Gen Electric Method and masking shield for interiorly coating hollow articles
US2831455A (en) * 1955-08-04 1958-04-22 Philco Corp Masking means
US2879740A (en) * 1957-05-02 1959-03-31 Gen Electric Apparatus for internally coating articles
US2946697A (en) * 1957-12-31 1960-07-26 Westinghouse Electric Corp Masking method and apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4190019A (en) * 1976-09-18 1980-02-26 Hunt Claude J L Vacuum metallizing interior of hollow article with masking shield
US4191128A (en) * 1977-11-19 1980-03-04 Hunt Claude J L Vacuum metallizing of hollow articles
WO2005095847A3 (en) * 2004-04-01 2007-02-08 Philips Intellectual Property Holder device for manufacturing partial coatings on at least the burner of a lamp bulb
CN112011764A (zh) * 2020-08-28 2020-12-01 重庆冠昌光电科技有限公司 一种灯泡玻壳内壁局部真空镀膜设备

Also Published As

Publication number Publication date
NL283791A (enrdf_load_stackoverflow)
ES292006A1 (es) 1964-03-01
CH432177A (de) 1967-03-15
DK106755C (da) 1967-03-13
BE637909A (enrdf_load_stackoverflow)
GB997899A (en) 1965-07-14
DE1287765B (enrdf_load_stackoverflow) 1969-01-23

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